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syntax_highlighting_and_error_highlighting.md: semantic highlighting

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Yann Cébron 2022-04-27 18:13:51 +02:00
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topics/reference_guide/custom_language_support/syntax_highlighting_and_error_highlighting.md
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@ -45,6 +45,13 @@ For highlighting lexer errors, the standard `TextAttributesKey` for bad characte
> >
{type="tip"} {type="tip"}
### Semantic ("Rainbow") Highlighting
[Semantic highlighting](https://www.jetbrains.com/help/idea/configuring-colors-and-fonts.html#semantic-highlighting) provides an additional coloring layer to improve the visual distinction of several related items (e.g., method parameters).
Register [`RainbowVisitor`](upsource:///platform/analysis-impl/src/com/intellij/codeInsight/daemon/RainbowVisitor.java) in `com.intellij.highlightVisitor` extension point.
[](#color-settings) must implement [`RainbowColorSettingsPage`](upsource:///platform/platform-api/src/com/intellij/openapi/options/colors/RainbowColorSettingsPage.java) in addition.
## Parser ## Parser
The second level of error highlighting happens during parsing. The second level of error highlighting happens during parsing.